Internal combustion engine



INTERNAL COMBUSTION ENGINE.

COLE.

APPLICATION FILED JANA. m1.

Pate ntedSept. 2, 1919.

aalagglllllllln @H I UNITED STATES PATENT OFFICE.

DON CODE, 0] CHICAGO, ILLINOIS, ASSIGNOR TO WAUKESHA KOTOB CO., 01WAUKESHA, WISCONSIN, A CORPORATION OF WISCONSIN.

INTERNAL-COMBUSTION ENGDIE.

Specification of Letters Patent.

Patented Sept. 2, 1919.

T 0 all whom it may concern:

Be it known that I, Dox Come, a citizen of the United States, residingat Chicago, in the county of Cook and State of Illinois, have invented acertain new and useful Improvement in Internal-Combustion Engines, ofwhich the following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

My invention relates to internal-combustion engines and is concernedwith the flow of the combustible mixture from the carbureter to theengine cylinder or cylinders. Notwithstanding the efficient design ofcarbureting apparatus for producing and delivering a proportionedmixture of air and fuel, such as gasolene, difficulty is frequentlyencountered in getting the mixture thus formed to the engine cylinder orcylinders in the condition originally determined by the carbureter. Inother words, even' though the ca-rbureting apparatus maybe highlyefficient, such efliciency is frequently-lost or greatly decreasedduring the passage of the mixture from the carbureter to the enginecylinder or cylinders. The disposition of the usual manual throttlecontrol atthe outlet of the ca-rbureter is a hindrance to" the continuedperfection of the mixture by rea son of its mechanical efl ect thereon,first be cause it forms an irregular restriction passing beyond whichthe combustible mixture tends to expand, and second, by reason ofitsphysical formation it tends to throw the mixture forcibly against theside walls of the passageway leading to the-engine cylinder 01'cylinders. In the case of the first effect the expansion causes areduction in speed and the tendency is for very small particles of fuel,which would otherwise be carried along with the current, to bedepositedon the walls of the-passageway. thus annihilating the proportioncarefully determined at the carbureter in the first instance and causingchoking of the engine due to excessive richness of mixture when theposition of throttle is subsequently changed, this deposited fuel beinsuddenly drawn to the cylinder or cylin ers. In the second efl'ect thedeposit of liquid fuel on the walls of the passageway is due to thedifference in weight between the air and the particles of unvaporizedfuel.

I therefore dispose a so=called Venturi tube, well known in and ofitself to those termined by the carbureter and homegeneous throughout.In this way, any particle of liquid fuel which remains unvaporized uponleaving the carbureter will either finally vaporize or will at least bekept suspended in the current to be completely vaporized as it nears andenters the hot cylinder or cylinders of the engine.

I shall describe my invention in a more detailed way by reference to theaccompanying drawing which is a longitudnal sectional view of acarbureter supplemented by the passage to the engine cylinder orcylinders.

In this drawing the carbureter casing 1 is provided at the bottom withthe primary air inlet 2 which leads to the Venturi tube 3 in which afuel nozzle 4 is disposed, this fuel nozzle being supported on aspider 5through which a passageway 6 is formed for the connection of the fuelnozzle with a suitable source of supply of liquid fuel, not shown. Itmay be assiuned that the normal level of fuel is on the line wm, asdetermined, for instance, by a float chamber. The Venturi tube 3 extendsinto the carbureting chamber a posed between the adjustable plug 12 andthe valve 9.

The carbureter outlet is indicated at 14:, this outlet being of tubularform and being controlled by means of a butterfly throttle 15 mountedupon a stem 16 journaled in the casing 1 and extending diametricallyacross the outlet. The Venturi tube member 16' is secured to the flange17 surrounding the carbureter outlet 14 and has its Venturi passagewaytherethrough in alinement, with and co-incident with the outlet 14, asillustrated. This Venturi tube member 16' extends into the pipe 18 whichleads to the engine cylinder or cylinders, this pipe being a manifold inthe case of a multi-cylinder engine. I I

It will now be clear that suction is transa higher suctions.

mitted from the engine cylinder or cylinders to the carbureter and that,responsive to this suction, air will be drawn in through passing throughthe outlet 14 of the car:

bureter, the combustible mixture will pass through the ventur'l tube 16,in the manner and with the efiect pointed out above, and on to theengine cylinder or cylinders.

I claim:

1. In combination, an internal combustion engine, a carbureter connectedtherewith, a throttle between said engine and said carbureter, and' aVenturi tube between said throttle and said engine.

2. In combination, an internal combustion engine, a carbureting chamberconnected therewith, a Venturi tube leading to said carbureting chamber,means for admitting air and fuel to said Venturi tube, a throttleengine. a carbureter connected therewith, a i

butterfly throttle between said engine and said carbureter, and aVenturi tube between said throttle and said engine.

4. In combination. an internal combustion engine, a carbureting chamberconnected therewith, a Venturi tube leading to said carbureting chamber,means for admitting air and fuel to said Venturi tube, a butterflythrottle between said carbureting chamber and said engine, and a Venturitube between said throttle and said engine.

5. In combination. an internal combustion engine, a carbureting chamberconnected therewith, a Venturi .tube leading to said carburetingchamber, means for admitting air and fuel to said Venturi tube, athrottle between said carbureting chamber and said engine, and a Yenturitube between said throttle and said engine, said last named Venturi tubebeing clamped between the carbureter and the pipe to the engine.

Inwitnesses whereof I hereunto subscribe my name this 29th day ofDecember, A. D.

DON COLE.

